Take your time and learn the industry before you jump right into it. Knowledge and experience are more important than timing or ideas.
I don't beleive there are any successful want-to-be's. You are either an entrepreneur or you are not....key qualities is not caring about status quo, vision and leadership.
Discipline. Focus. Daily habits and rituals. Single-mindedness. Attachment to a big vision.
Entrepreneurs need to have good people skills and internet skills. Honestly, if they know something about business, marketing, or web design, even better!
Education, education and more education
tough skin, money management skills, surrounded by a good Community of entrepreneurs.
To realize that it's not personal, it's business, first and foremost. To be willing to surround yourself with knowledgeable people cos we are always going to need someone who knows more than we do, and do your research before spending a dime.
Organization, Perserverence, and Professionalism
That is a funny question. The answer is equally humorous: learn to do everything. You will need it.
I'd advise a want-to-be entreprenuer to aquire general business skills, basic computer, sales and service, money management, business networking skills and a solid set of professional credentials. Low risk adversity, flexibility and the ability to recognize what your weaknesses are can also be key.
vision, determination/tenancity and guts.....systematize and hire out for all other skills
Get yourself a team, do something wild and try to be as bold as possible!
Do not underestimate the boring side of business. You maybe driven, sell loads etc etc, but the paperwork has to be completed on time. Outsource it (creative people don't often want to deal with formailities) but don't get behind and end up with fines etc for not dealing with paperwork.. it's such a drain and waste of resources if you get behind.